Massive parapneumonic effusion leading to hypercapnic respiratory failure in a patient with <i>Legionella pneumophila</i> infection

We present a case of a patient who was successfully treated for a critical illness involving a large parapneumonic effusion and hypercapnic respiratory failure secondary to infection with <i>Legionella pneumophila</i> This pathogen is thought to have originated from a commercially available mushroom growing kit.